Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Millions		3 Months Ended		9 Months Ended
		Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Statement of Comprehensive Income [Abstract]
Net earnings		$ 629	$ 567	$ 1,908	$ 1,803
Other comprehensive income (loss) before income taxes:
Unrealized foreign currency translation gains (losses) during period		195	186	1,783	25
Unrealized gains (losses) on investment securities:
Unrealized holding gains (losses) on investment securities during period		(527)	(401)	4,855	(2,266)
Reclassification adjustment for realized (gains) losses on investment securities included in net earnings		33	138	(33)	20
Unrealized gains (losses) on derivatives during period		0	(1)	11	(3)
Pension liability adjustment during period		0	0	(6)	1
Total other comprehensive income (loss) before income taxes		(299)	(78)	6,610	(2,223)
Income tax expense (benefit) related to items of other comprehensive income (loss)		(231)	(99)	1,871	(772)
Other comprehensive income (loss), net of income taxes	[1]	(68)	21	4,739	(1,451)
Total comprehensive income (loss)		$ 561	$ 588	$ 6,647	$ 352

[1] All amounts in the table above are net of tax.